US PATENT SUBCLASS 33 / 749
.~.~.~.~.~ Only three

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

700  DF  DISTANCE MEASURING {13}
732  DF  .~ Of flexible material {7}
734  DF  .~.~ By rolling contact {11}
747  DF  .~.~.~ Opposed rotating surfaces {1}
748  DF  .~.~.~.~ Plural {1}
749.~.~.~.~.~ Only three

DEFINITION

Classification: 33/749

Only three:

(under subclass 748) Subject matter having only three rotatable members.